You will get slightly better performance than when a functioning trap oxidizer is in place.

However, if you are getting the trap oxidizer replaced because it is plugged (and MB won't replace it otherwise!!), you will get a HUGE increase in performance -- you are just about dead in the water now! You also have a dead turbo, too, don't forget.

The only reason, apparently, that my brother's SDL was still running was that the seal ring on the trap had blown -- we were hearing a strange whistling noise (sort of like a quiet OTR truck turbo) -- thought it was the turbo, was in fact the exhaust sqealing on the way out!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!